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Chapter 4. Data in Clojure

How to Represent and Manipulate Data

Clojure is a dynamically typed language, which means that you never need to explicitly define the data type of symbols, functions, or arguments in your programs. However, all values still have a type. Strings are strings, numbers are numbers, lists are lists, etc. If you try to perform an unsupported operation on a type, it will cause an error at runtime. It is the programmer's responsibility to write code in such a way that this does not happen. This should be very natural to those with a dynamic language background, while it will no doubt take some getting used to for those who have only used static languages in the past.

Clojure types are at the same time very simple and fairly complicated. ...

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